/*
 *  Copyright (c) 2001-2007, Jean Tessier
 *  All rights reserved.
 *  
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  
 *      * Redistributions of source code must retain the above copyright
 *        notice, this list of conditions and the following disclaimer.
 *  
 *      * Redistributions in binary form must reproduce the above copyright
 *        notice, this list of conditions and the following disclaimer in the
 *        documentation and/or other materials provided with the distribution.
 *  
 *      * Neither the name of Jean Tessier nor the names of his contributors
 *        may be used to endorse or promote products derived from this software
 *        without specific prior written permission.
 *  
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jeantessier.text;

import java.io.*;

public final class Hex {
    private Hex() {
        // Do nothing
    }

    public static void print(PrintStream out, byte[] bytes) {
        for (byte b : bytes) {
            print(out, b);
        }
    }

    public static void print(PrintWriter out, byte[] bytes) {
        for (byte b : bytes) {
            print(out, b);
        }
    }

    public static void print(PrintStream out, byte b) {
        int highBits = (b & 0xF0) >> 4;
        int lowBits  = (b & 0x0F);
    
        print(out, highBits);
        print(out, lowBits);
    }

    public static void print(PrintWriter out, byte b) {
        int highBits = (b & 0xF0) >> 4;
        int lowBits  = (b & 0x0F);
    
        print(out, highBits);
        print(out, lowBits);
    }

    public static void print(PrintStream out, int n) {
        out.print(toHexChar(n));
    }

    public static void print(PrintWriter out, int n) {
        out.print(toHexChar(n));
    }

    public static String toString(byte[] bytes) {
        StringBuffer result = new StringBuffer();
        toString(bytes, result);
        return result.toString();
    }

    private static void toString(byte[] bytes, StringBuffer buffer) {
        for (byte b : bytes) {
            toString(b, buffer);
        }
    }

    public static void toString(byte b, StringBuffer buffer) {
        int highBits = (b & 0xF0) >> 4;
        int lowBits  = (b & 0x0F);

        toString(highBits, buffer);
        toString(lowBits, buffer);
    }

    private static void toString(int n, StringBuffer buffer) {
        buffer.append(toHexChar(n));
    }

    public static String toHexChar(int n) {
        return Integer.toHexString(n).toUpperCase();
    }
}
